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Leaning towards this one---
Comp Cam XFI RPM HI-LIFT LSx 54-428-11
228/230 in./ex. duration
.571/.573 in./ex. lift
112 degrees LSA
I know those numbers are all over the place. Just trying to get an idea of what people like and recommend. I would love to hear from tuners and vendors.
if your keeping the stock stall, go with the smallest cam. my buddies c5 has that Torquer v2 cam in his. Sounds SICK!! he has a 3400 stall, and it only surges at 45mph when the converter initially locks up. it should run better on your bigger 6.0 than his 5.7 and your faster E38 pcm.
combine that Torquer v2 cam and full boltons and youll be close to 450 with your auto.
I drive my 2006 A6 every day to work in Vegas. The cam I went with was a Patrick G custom designed 220/228 duration, .564/.571 lift, LSA 114 + 2 on XE lobes. Comp Cams ground the cam and I had a local shop(NRP) install and tune it. The car runs great with no surging, or torque converter issues, plus the idle (650 rpm) is just lumpy enough to be noticed Additionally, it does not have the dreaded sewing machine valve train noise. As a side note, I used Comp Cams 918 springs.
411/391 RWHP/TQ on a Dynojet in Vegas. The car is much stronger throughout the rpm range with a nice torque curve. If you look at my signature, you will see that the car has Texas Speed ported 243 heads and an LS7 Z06 exhaust sytem. Orginal stock RWHP with a dyno tune on the same Dynojet was 343. It knocked 1.5 seconds off the 1/4 mile drag times and added 10 mph.